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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
What is the following is incorrect.
Choose an answer
Water is more polar than H2S
H2O2 is a planar molecule
Heavy water is produced by the exhauative electrolysis of water made acidic
H2O2 act both as oxidising as well as reducing agent in acidic medium
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Question # 2
The splitting of H2O can be carried out through
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Photolysis
Electrolysis
Dialysis
Hydrogenation
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Question # 3
Which of the following process always involve the decrease in oxidation number.
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Hydrolysis
Elecomposition
Oxidation
Reduction
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Question # 4
What combination of elements has high electrical resistance high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating.
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Aluminium bronze
Nichrome
Hastelloy
None of above
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Question # 5
Glucose and fructose react with which of the following reagent to give same product.
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Tollen's reagent
Phenyl hydrazine
Hydroxyl amine
All of these
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Question # 6
Which of the following substance is colloidal in nature.
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Clay
Al2O3
Fe2O3
All above
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Question # 7
The degree of dissociation of weak acid increases with.
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Decreasing pressure
Increasing pressure
Increasing concentration
Decreasing concentration
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Question # 8
Which of the following dye is used an antiseptic .
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Methyl orange
Mercurochrome
Alizarin
Bismarck brown
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Question # 9
Considering the elements F, Cl ,O and N, the correct order of their chemical reactivity in terms of oxidizing property is.
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F > Cl > N
F > O > Cl > N
Cl > F > O > N
O > F > N > Cl
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Question # 10
The rate constant of a reaction depends on
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Concentration of reactants
Concentration of products
Temperature
Time
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Question # 11
Homolytic fission of convalent bond results in the formation of.
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Free redicals
Carbocations
Carbonions
Both B and C
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Question # 12
Which of the following techniques are used for minimizing water pollution.
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Stabilization of ecosystem
Recharge of the waste
Waste treatment
All above
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Question # 13
Stainless steel contains.
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Fe + Cr+ Ni
Fe + Ni + Cu
Fe + Cr+ Cu
Cu + C + Ni
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Question # 14
The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.
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Soft base
Hard Base
Soft acid
Hard acid
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Question # 15
Which of the following molecule contains two dative bonds according to Lewis structure.
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NH3
SO3
PCl5
BF3
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Question # 16
The Lewis formula of SOCl2 the total number of bond pairs and lone pairs of electrons around sulphur are.
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2,1
2 ,2
3 ,1
3 ,0
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Question # 17
Which of the following will be most effective int he coagulntion of
Fe (OH)3 sol.
Choose an answer
NaCl
MgSO4
AlCl3
Mg3 (PO4)2
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Question # 18
Which of the following regions of the spectrum would be used to determine the structure of the crystalline solids.
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Microwave
X-rays
Visible
Infrared
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Question # 19
Bases and reducing agents are electron giving agents and also called as.
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Electrodotic
Electrophile
Nucleophile
None of above
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Question # 20
Which one of the following statements if false with respect to CFT.
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In an octahederal crystal field. the d electron on a metal ion occupy the ex of orbitals before they occupy the t98 not of orbitals.
Diamagnetic metal ions cannot have an odd number of electrons
Low spin complexes can be paramagnetic
Low spin complexes contain strong field ligands.
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Question # 21
SO2 is generated from which of the following industry.
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Drying and packing
Paper
Pulp
paper and pulp
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Question # 22
Dull red flame is observed with
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Calcium salt
Barium salt
Strontium salt
Sodium salt
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Question # 23
LiAIH4 is most useful reducing agent It reduce to alcohol
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Aldehydes
Ketone
Carboxylic acid
Any of above
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Question # 24
Which of the following sulphide is yellow in colour.
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HgS
PbS
CdS
SnS
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Question # 25
Aluminothermy used for on the spot welding of large iron structures is based upon the fact that.
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As compared to iron, aluminium has greatest affinity for oxygen.
As compared to aluminium, iron has greater affinity for oxygen
Reaction between aluminim and oxygen endothermic
Reaction between iron and oxygen is endothermic
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Question # 26
Which of the following responsible for depletion of ozone layer in upper strata of the atmosphere.
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Polyhalogens
Ferrocene
Freons
Fullerencs
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Question # 27
Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.
Choose an answer
Chi square test
F -Test
Student's test
Coefficient of variance
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Question # 28
All halogens exist as covalent molecules.
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Monoatomic
Daitomic
Triatonic
Tetra atomic
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Question # 29
Helium oxygen mixture is used by deep sea divers in preference to nitrogen oxygen mixture, because.
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Helium is much less soluble in blood than nitrogen
Nitrogen is much less soluble in blood than helium
Due to high pressure deep under the sea, nitrogen and oxygen react to give poisonous nitric oxide.
Nitrogen is highly soluble in wateer
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Question # 30
Setting of plaster of Paris volves.
Choose an answer
Oxidation with atmospheric oxygen
Combination with atmosphere CO2
Dehydration
Hydration to yield another hydrate
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Question # 31
If steel is heated to a temperature well below red heated and is then cooled slowly the process is called.
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Annealing
Quenching
Tempering
Nitriding
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